[HTC Sensation] Lavell7298:
Maintain Great Speed & Battery Life While Running 2 Under-Voltage CPU Cores!

I may be able to provide a solution to this problem. I've been testing my setup for a few days and it seems to work very well for me.

I have my phone running at 1.83GHz with both cores enabled thanks to the System Tuner Pro app. At the beginning of my workday, my battery is at 100%. By the end of the workday, my battery is anywhere from 60% - 80% depending on my usage for that day. My heavy usage comes from GPS and Internet because I use them in relation to my job. Give this solution a try and see if it works for you. Here's how to set it up:

1) Go to the market and download and install System Tuner Pro. This is

not

a free app ($3.99).

2) Launch the app and go to CPU tab. Underneath the Governor setting, set the maximum CPU frequency to what you want your phone to run at. At the Governor setting, select conservative.

3) Now activate both cores. Back out of the CPU tab and go to Settings, Active tweaks. Under "Force all CPUs online", click init.d script. Under Re-apply CPU settings, select init.d script.

4) Reboot the device. That's it. With these settings, the phone will use both cores of the CPU at a conservative speed for all tasking. It will automatically ramp up the speed of the 2 cores as the load requires it and bring it back down once the load is complete. All the while great speed and battery life will be maintained!! :)

Remember, results will vary depending on the usage of your phone. But you should see some sort of improvement.

All of this information is assuming that the Anker 1900mAh battery is installed and the phone is running SebastianFM's Overclocked Kernel v1.4.0!

Update (April 8, 2012):

If you want to take this solution to another level, read the following post to get an insight on under-voltage the CPU. Much credit to mac87!

http://xdaforums.com/showpost.php?p=24478175&postcount=2342

I gave this a shot and to my surprise, my phone has become more smooth and responsive! I'm currently using the 9% under-voltage values. I can definitely recommend this tweak as it saves unused energy as well as increases performance! I'm sure a script can be written into the ROM to implement this tweak. But if you have System Tuner Pro, a script isn't necessary. Here's how to set it up with System Tuner Pro:

1) Launch the app and select the Voltage tab.

2) From there, set the values as indicated in the linked post. To be safe, start off with the 7% under-voltage values.

3) After the values are set, back out of the Voltage tab and go to Settings, Active tweaks. Under "Force all CPUs online", select init.d script. Under Re-apply CPU settings, select init.d script.

(If this is already set from the "above" tweak, you may skip this step.)

4) Reboot the device. If your phone reboots successfully, you can try the 9% under-voltage values. Set those values and reboot the device. If your phone reboots successfully after that, you can try the 11% under-voltage values. Ultimately, you'll set the values that best suits your phone.

Every phone will behave differently. So be very careful when performing this tweak. Perform as many tests as necessary to ensure the stability of your phone.

That's it. Enjoy your even more tweaked phone!:D